Photocatalytic reaction channel and double-layer air purification lamp comprising same

Abstract

The utility model relates to the technical field of photocatalysis, in particular to a photocatalytic reaction channel and a double-layer air purification lamp comprising the same, the reaction channel comprises a fan, a photocatalyst filter screen, an ultraviolet lamp, a fixing plate, a compression channel, a collection channel and a baffle, and the fan, the compression channel, the collection channel, the photocatalyst filter screen and the baffle are sequentially arranged and fixed on the fixing plate; the compression channel comprises a first flat plate and a second flat plate which are obliquely arranged, the collection channel comprises a third flat plate and a fourth flat plate which are obliquely arranged, the fan is arranged on one side of the wide end of the compression channel, the wide end of the collection channel is arranged on one side of the narrow end of the compression channel, and the end face of the compression channel is separated from the end face of the collection channel. The ultraviolet lamp is fixed on one side, facing the photocatalyst filter screen, of the baffle plate; the double-layer air purification lamp comprises a lamp shell, a lighting lamp strip and the reaction channel. The photocatalytic reaction channel can flexibly adapt to various spaces and scenes, and the application range of the photocatalytic technology is widened.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photocatalysis, in particular to a photocatalytic reaction channel and a double-layer air purification lamp comprising the same. BACKGROUND

[0002] With the increasing air pollution, people use various air purification technologies to improve indoor air quality, among which photocatalysis technology has attracted widespread attention due to its high efficiency and environmental protection. Photocatalysis technology uses the strong oxidizing substances generated by photocatalyst materials under light conditions to effectively degrade organic pollutants and harmful gases in the air, thereby achieving air purification.

[0003] Traditional photocatalytic air purification devices usually adopt a closed and through reaction channel design, including an air inlet, an air outlet, a photocatalyst module and an ultraviolet lamp, to ensure that air can flow through the photocatalyst and undergo purification reaction under the action of light. However, this design has a significant problem: the reaction channel needs to occupy a large space to install the photocatalyst module and the air flow pipe, which makes it difficult to deploy flexibly inside small devices. For example, in small household appliances, portable air purifiers or compact electronic devices, the traditional photocatalytic reaction channel is often too large to be effectively integrated, limiting its application in small devices.

[0004] In summary, since the existing photocatalytic air purification device usually adopts a closed and through reaction channel design, it needs to occupy a large space to install the air flow pipe, which makes it difficult to deploy flexibly inside small devices, limiting the application of photocatalytic technology in small household appliances, portable air purifiers or compact electronic devices. CONTENT OF THE INVENTION

[0005] The present application relates to the field of photocatalysis, in particular to a photocatalytic reaction channel and a double-layer air purification lamp comprising the same.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0007] The application provides a photocatalytic reaction channel, which comprises a fan, a photocatalyst filter screen, an ultraviolet lamp, a fixing plate, a compression channel, a collection channel and a baffle. The fan, the compression channel, the collection channel, the photocatalyst filter screen and the baffle are sequentially arranged and fixed on the fixing plate. The compression channel comprises a first flat plate and a second flat plate arranged obliquely, and the collection channel comprises a third flat plate and a fourth flat plate arranged obliquely. The fan is arranged at one side of the wide end of the compression channel, and the wide end of the collection channel is arranged at one side of the narrow end of the compression channel. The end surface of the compression channel is separated from the end surface of the collection channel. The ultraviolet lamp is fixed on the baffle and faces the photocatalyst filter screen.

[0008] The photocatalytic reaction channel is driven by the rotation of the fan to cause air flow, guide the air into the reaction channel, and then the air enters the compression channel, the flow rate of the air is increased by the contraction of the compression channel, the collection channel is arranged behind the compression channel, the air flowing out of the compression channel is collected by the collection channel and then discharged, so that the air flows to the photocatalyst filter screen and then is discharged from the reaction channel. After the photocatalyst filter screen is irradiated by the ultraviolet lamp, a photocatalytic reaction is generated, and the air flowing through the photocatalyst filter screen is decomposed and purified, so that the air in the space is recycled and purified. The oblique flat plates and the separated end surfaces of the compression channel and the collection channel reduce the dependence on the traditional closed straight pipeline, realize the continuity and stability of the air flow, and significantly reduce the volume of the overall structure, so that the photocatalytic reaction channel can be flexibly integrated into small household appliances, portable air purifiers or compact electronic devices, and the application of the traditional photocatalytic reaction channel in small devices is broken through.

[0009] Further, the size of the narrow end of the compression channel is smaller than the size of the wide end of the collection channel. The air enters the compression channel under the driving of the fan, the flow rate of the air is increased due to the gradually narrowing of the channel, and when the air flow enters the collection channel, the air flow can be appropriately diffused in this area because the size of the wide end of the collection channel is large, so that the problems of too fast or too slow air flow in local areas are avoided, and the overall uniformity of the photocatalytic reaction is improved.

[0010] Further, the first flat plate and the second flat plate are symmetrically arranged, and the third flat plate and the fourth flat plate are symmetrically arranged. The symmetrically arranged flat plates can ensure uniform distribution and efficient flow of the air flow, reduce the generation of air flow turbulence and vortex at the photocatalyst filter screen, and affect the catalytic efficiency.

[0011] Further, the compression channel and the collection channel are coaxial. The coaxial two channels can smoothly transition the air flow from the compression channel to the collection channel, facilitate the collection of most of the air flow discharged from the compression channel by the collection channel, and improve the air flow transmission efficiency.

[0012] Further, the fan is arranged in the wide end of the compression channel. This design can make full use of the space of the wide end and efficiently suck in air by means of the large air inlet area.

[0013] Further, the photocatalyst filter blocks the narrow end of the collection channel. The narrow end of the collection channel is blocked by the photocatalyst filter, so that the air flow must flow through the photocatalyst filter, ensuring that the photocatalytic reaction occurs sufficiently, maximizing the air purification quality.

[0014] Further, the baffle is V-shaped, and the top end of the baffle faces the photocatalyst filter. The V-shaped baffle with the top end facing the photocatalyst filter can guide the air flow to flow reasonably, facilitate the air flow to flow out of the reaction channel, and prevent the air flow from directly impacting the photocatalyst filter to avoid damaging it.

[0015] Further, the inner angle of the V-shaped baffle is 150-170°, and the distance between the top end of the baffle and the photocatalyst filter is 3-6 cm. The range of the inner angle 150-170° is selected to balance the ultraviolet lamp irradiation range and the air flow condition. If the inner angle is too small, the ultraviolet light may be dispersed and cannot effectively reach the photocatalyst filter. If the inner angle is too large, the air flow may be turbulent or form local vortex, which is not conducive to purification. If the distance between the top end of the baffle and the photocatalyst filter is too large, the ultraviolet lamp irradiation intensity is affected. If the distance is too small, the air flow resistance is increased, making it difficult for air to reach the photocatalyst filter. 3-6 cm is an optimized value considering both.

[0016] Further, it further includes a top plate covering the fan, the compression channel, the collection channel, the photocatalyst filter, the ultraviolet lamp, and the baffle. The top plate covers the reaction channel and forms a photocatalytic reaction channel together with the fixed plate to define the air flow direction.

[0017] The application also provides a double-layer air purification lamp, which comprises the photocatalytic reaction channel described above. The double-layer air purification lamp combines the lighting function of the lamp with the air purification function.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] The application divides the traditional closed and through reaction channel into two parts through the interval design between the compression channel and the collection channel, significantly reduces the space required for the air flow channel, and enables the photocatalytic reaction channel to be flexibly deployed in small devices and other narrow spaces. This design not only breaks through the application limitation of photocatalytic technology in small devices, but also optimizes the overall structure, providing a feasible solution for efficient air purification.

[0020] The interval area between the compression channel and the collection channel forms a semi-open structure, which can separate large-particle pollutants (such as dust) from the airflow and discharge the large-particle pollutants from the reaction channel, without the need of additionally installing an activated carbon filter screen, so that the equipment structure is simplified, space and cost are saved, and maintenance difficulty is reduced. Meanwhile, the design produces a turbulent flow when the airflow flows through the photocatalyst filter screen, increases the contact opportunity of the pollutants and the photocatalyst particles, and significantly improves the efficiency of the photocatalytic reaction and the air purification effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A top view schematic diagram of a photocatalytic reaction channel is provided in the utility model;

[0022] Figure 2 A schematic diagram of a double-layer air purification lamp including the channel thereof is provided in the utility model.

[0023] Icon: 1-fan; 2-compression channel; 21-first flat plate; 22-second flat plate; 3-collection channel; 31-third flat plate; 32-fourth flat plate; 4-photocatalyst filter screen; 5-baffle; 6-ultraviolet lamp; 7-fixing plate; 10-lamp housing; 11-first lamp shell; 12-second lamp shell; 20-illumination lamp strip. DETAILED DESCRIPTION

[0024] In order to make the implementation process of the utility model clearer, the following will be described in detail in combination with the drawings.

[0025] Example 1

[0026] The utility model provides a kind of photocatalytic reaction channel, such as Figure 1As shown, the reaction channel includes a fan 1, a compression channel 2, a collection channel 3, a photocatalyst filter screen 4, a baffle 5, an ultraviolet lamp 6, and a fixed plate 7. Among them, the fan 1, the compression channel 2, the collection channel 3, the photocatalyst filter screen 4, and the baffle are arranged in sequence and fixed on the fixed plate 7, and the ultraviolet lamp 6 is fixed on the baffle 5 and faces the side of the photocatalyst filter screen 4. The compression channel 2 includes a first flat plate 21 and a second flat plate 22 arranged obliquely, and the collection channel 3 includes a third flat plate 31 and a fourth flat plate 32 arranged obliquely. The materials of the first flat plate 21, the second flat plate 22, the third flat plate 31, the fourth flat plate 32, the baffle 5, and the fixed plate 7 can be plastic, metal, resin, etc. The fan 1 is placed on one side of the wide end of the compression channel 2 to promote air flow. Air enters the compression channel 2 through the fan 1, which is the air inlet, and is discharged after being accelerated by the compression channel 2. The wide end of the collection channel 3 is placed on one side of the narrow end of the compression channel 2 to collect the air discharged from the narrow end of the compression channel 2, which is then discharged from the narrow end of the collection channel 3 after being diffused in the collection channel. The air flows to the photocatalyst filter screen 4, and the narrow end of the collection channel 3 is the air outlet. The photocatalyst filter screen 4 is irradiated by the ultraviolet lamp 6 to produce a photocatalytic reaction, which decomposes and purifies the air flowing through it, thereby realizing the circulation and purification of the air in the space. The end face of the compression channel 2 is separated from the end face of the collection channel 3, which reduces the occupation of space compared to traditional photocatalytic reaction channels, and increases the application scenarios of photocatalytic technology. Specifically, the distance between the end face of the compression channel 2 and the end face of the collection channel 3 is not more than 20 cm, which is related to the speed of the fan 1. If the speed of the fan 1 is high, the distance should be large to avoid the air flow speed at the air outlet being too fast to cause insufficient reaction; if the speed of the fan 1 is low, the distance should be small to maintain the efficiency of the air flow through the photocatalyst filter screen 4. In addition, the distance can separate dust and other low-speed particles from the air flow and discharge them from the channel, simplifying the equipment such as activated carbon filter screen.

[0027] Further, the size of the narrow end of the compression channel 2 is smaller than the size of the wide end of the collection channel 3. The compression channel 2 compresses the air volume, increases the air speed, and promotes the rapid flow of air from the narrow end; the wide end of the collection channel 3 collects the air discharged from the compression channel 2, which is then discharged from the narrow end after being gathered. The size of the narrow end of the compression channel 2 is smaller than the size of the wide end of the collection channel 3, which facilitates the air flow into the collection channel 3 to be appropriately diffused in the collection channel 3 area, avoiding the problem of air flow speed being too fast or too slow in local areas, and improving the overall uniformity of the photocatalytic reaction. Specifically, the size of the wide end of the collection channel 3 is 1.5-2 times the size of the narrow end of the compression channel 2, which can avoid air flow turbulence or pressure loss caused by sudden changes in channel size, and can provide sufficient diffusion space for air flow while ensuring efficient air flow, making the contact between air and photocatalyst filter screen 4 more sufficient, thereby improving the uniformity and efficiency of the photocatalytic reaction. In addition, such design can also reduce air flow resistance and adapt to the efficient demand for space utilization of small-sized equipment, ultimately achieving compact and efficient air purification effect.

[0028] Further, the first plate 21 and the second plate 22 are symmetrically arranged, and the third plate 31 and the fourth plate 32 are symmetrically arranged. The symmetrically arranged plates make the shape of the compression channel 2 and the collection channel 3 isosceles trapezoidal, which can ensure the uniform distribution and efficient flow of the air flow, reduce the generation of air flow turbulence and vortex at the photocatalyst filter 4, and affect the catalytic efficiency. The width of the compression channel 2 and the size of the first plate 21 can be the same or different, preferably, the width of the compression channel 2 is less than twice the size of the first plate 21. When the width of the compression channel 2 is too large and the size of the first plate 21 is unchanged, it cannot compress and accelerate the air flow, which affects the air flow of the overall reaction channel. The size of the third plate 31 is smaller than the size of the first plate 21, so as to facilitate the air flow. The compression channel 2 and the collection channel 3 are isosceles trapezoidal channels, and the inclination angle of the plate is the included angle with the center height of the channel. The inclination angle of the first plate 21 is 15°-20°, and the inclination angle of the third plate 31 is 10°-20°, and the inclination angle of the third plate 31 is smaller than the inclination angle of the first plate 21. The larger inclination angle of the first plate 21 is mainly used for quickly compressing the air flow and increasing the wind speed; the smaller inclination angle of the third plate 31 helps to stabilize the air flow, ensures that the gas can pass through the photocatalyst filter 4 smoothly, increases the residence time of the pollutants on the surface of the photocatalyst, and thus improves the efficiency of the photocatalytic reaction.

[0029] Further, the compression channel 2 and the collection channel 3 are coaxial. The coaxial two channels can make the air flow smoothly transition from the compression channel 2 to the collection channel 3, and improve the air flow transmission efficiency. In this way, the reaction channel can collect most of the air volume discharged from the compression channel 2 due to the opposite ends of the adjacent compression channel 2 and collection channel 3, and can also adapt to spaces of different shapes and structures, and improve the flexibility of the photocatalytic reaction channel.

[0030] Further, the fan 1 is arranged in the wide end of the compression channel 2. The fan 1 is a blowing fan, which functions to promote the air flow in the channel, and the position of the fan 1 is movable. Specifically, the distance between the fan 1 and the wide end of the compression channel 2 is not more than the length of the channel, which needs to ensure that the air volume entering the channel is sufficient, and preferably, the fan 1 is arranged in the wide end of the compression channel 2. This design can make full use of the space of the wide end and efficiently suck air with a larger air inlet area.

[0031] Furthermore, the photocatalytic filter 4 blocks the narrow end of the collection channel 3. The photocatalytic reaction takes place on one side of the narrow end of the collection channel 3. The photocatalytic filter 4 is fixedly installed at the narrow end of the collection channel 3, and the ultraviolet lamp 6 emits ultraviolet light to irradiate the photocatalytic filter 4, thereby carrying out the photocatalytic reaction. Specifically, by blocking the narrow end of the collection channel 3 with the photocatalytic filter 4, the airflow exiting the collection channel 3 must all flow through the photocatalytic filter 4, ensuring that the air in the area circulates through the photocatalytic filter 4, fully undergoing the photocatalytic reaction, and maximizing the improvement of air purification quality.

[0032] Furthermore, the baffle 5 is V-shaped, with an inner angle of 150°-170°. The top of the baffle 5 faces the photocatalytic filter 4, and the distance between the top of the baffle 5 and the photocatalytic filter 4 is 3-6cm. The V-shaped baffle 5, with its top facing the photocatalytic filter 4, guides the airflow to flow rationally, facilitating the airflow out of the reaction channel, while preventing turbulent airflow from directly impacting the photocatalytic filter 4 and causing damage. The inner angle range of 150°-170° is chosen to balance the irradiation range of the ultraviolet lamp 6 and the airflow. Preferably, the inner angle of the baffle 5 is 160°. If the inner angle is too small, the light emitted by the ultraviolet lamp 6 may be scattered away from the photocatalytic filter 4, failing to effectively reach the photocatalytic filter 4 and affecting the photocatalytic reaction efficiency. If the inner angle is too large, airflow turbulence or the formation of local eddies may occur, which is not conducive to the circulation and discharge of purified air. The baffle 5 is twice the size of the narrow end of the collection channel 3. It reflects the air exiting the collection channel 3, creating turbulence on one side of the narrow end and prolonging the residence time of polluted air in the photocatalytic reaction zone, thus promoting catalytic efficiency. The distance between the top of the baffle 5 and the photocatalytic filter 4 is dynamically adjusted according to the overall size of the reaction channel; preferably, the distance is 4 cm. Too large a distance will affect the intensity of the ultraviolet lamp 6, while too small a distance will increase airflow resistance, making it difficult for air to reach the photocatalytic filter 4.

[0033] Furthermore, it also includes a top plate, which covers the fan 1, compression channel 2, collection channel 3, photocatalytic filter 4, ultraviolet lamp 6, and baffle 5, forming a photocatalytic reaction channel together with the fixed plate 7, thus defining the airflow direction.

[0034] Example 2

[0035] This utility model also provides a double-layer air-purifying lamp, such as Figure 2 As shown, the double-layer air-purifying lamp includes a lamp housing 10, an illumination strip 20, and the aforementioned photocatalytic channel.

[0036] The lamp housing 10 comprises a first lamp shell 11 and a second lamp shell 12, and a sandwich space is arranged between the first lamp shell 11 and the second lamp shell 12. A reaction channel is arranged in the sandwich space of the first lamp shell 11 and the second lamp shell 12 and is covered by the second lamp shell 12, so as to form a semi-open structure. The lighting lamp strip 20 is arranged in a groove on a side of the first lamp shell 11 close to the periphery, and the light irradiation direction is lateral outward divergence, so as to ensure the lighting effect and create a soft environment atmosphere. The lamp adopts a functional partition design, the first lamp shell 11 bears the fixing support and lighting functions of the lamp, and the stability and lighting effect of the lamp are ensured, and the second lamp shell 12 integrates a photocatalytic purification system, and through the unique structural design, harmful substances in air can be effectively decomposed, and the air purification function is realized. The double-layer structure design combines the traditional lighting function and the air purification function, and a multifunctional composite lamp is obtained. In the specific use process, the user can adjust the lighting function and the air purification function through the independent control system according to actual needs.

[0037] The second lamp shell 12 of the lamp is two fan-shaped plates with opposite top points, and the sandwich space between the first lamp shell 11 and the second lamp shell 12 is open and incoherent. The traditional photocatalytic channel cannot be realized in this space area, and the reaction channel provided by the utility model can adapt to this situation and complete the photocatalytic reaction. Meanwhile, the semi-open area of the channel is beneficial to the discharge of catalytic products and particulate matters, does not need to install an activated carbon filter screen for adsorbing dust, saves space and cost, and also saves manpower for replacement.

[0038] In conclusion, the utility model provides a photocatalytic reaction channel and a double-layer air purification lamp comprising the same, the reaction channel can adapt to various spaces and scenes and has high flexibility, and has a good application prospect in the field of photocatalytic technology.

[0039] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement and the like made in the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A photocatalytic reaction channel comprising a fan, a photocatalyst filter, an ultraviolet lamp, and a fixing plate, characterized in that: The air purification lamp further comprises a compression channel, a collection channel, a baffle, the fan, the compression channel, the collection channel, the photocatalytic filter screen and the baffle are sequentially arranged and fixed on the fixed plate, the compression channel comprises a first flat plate and a second flat plate arranged obliquely, the collection channel comprises a third flat plate and a fourth flat plate arranged obliquely, the fan is arranged at one side of the wide end of the compression channel, the wide end of the collection channel is arranged at one side of the narrow end of the compression channel, the end surface of the compression channel is separated from the end surface of the collection channel, and the ultraviolet lamp is fixed on the baffle and faces one side of the photocatalytic filter screen.

2. The photocatalytic reaction channel according to claim 1, characterized in that: The size of the narrow end of the compression channel is smaller than the size of the wide end of the collection channel.

3. The photocatalytic reaction channel according to claim 2, characterized in that: The first flat plate and the second flat plate are symmetrically arranged, and the third flat plate and the fourth flat plate are symmetrically arranged.

4. The photocatalytic reaction channel according to claim 3, characterized in that: The compression channel and the collection channel are coaxial.

5. The photocatalytic reaction channel according to claim 1, wherein: The fan is arranged in the wide end of the compression channel.

6. The photocatalytic reaction channel according to claim 1, wherein: The photocatalytic filter screen blocks the narrow end of the collection channel.

7. The photocatalytic reaction channel according to claim 1, wherein: The baffle is V-shaped, and the top end of the baffle faces the photocatalytic filter screen.

8. The photocatalytic reaction channel according to claim 7, characterized in that: The inner angle of the V-shaped baffle is 150-170 degrees, and the distance between the top end of the baffle and the photocatalytic filter screen is 3-6 cm.

9. The photocatalytic reaction channel according to any one of claims 1-8, characterized in that: The air purification lamp further comprises a top plate covering the fan, the compression channel, the collection channel, the photocatalytic filter screen, the ultraviolet lamp and the baffle.

10. A dual layer air purification luminaire, characterized by: The double-layer air purification lamp comprises the photocatalytic reaction channel according to claim 1.

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